Natural Factors Stress B Formula contains a unique blend of B vitamins plus 1000 mg of vitamin C to help combat the negative effects of stress and for the maintenance of good health. B vitamins help enzymes in the body and are involved in energy production and red blood cell formation. Health Benefits: Supports nervous system; Helps you get a more sound sleep; Promotes proper brain function; Essential for healthy hair, skin, and nails; Helps metabolize proteins, carbohydrates, and fats; Especially important when under stress.